A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Hi Ad3a1c8,
Can you confirm if you have the recent updates for your Office 2011 for Mac? Provide the current version of your Office 2011 for us to verify.
On inserting slides, try inserting the default slide template and then check the outcome. Verify if you have add-ins enabled for your PowerPoint. Disable the add-ins via Tools > Add-ins.
Try starting up in safe mode, check if there are differences when inserting new slide. To start in safe mode, follow the steps on this link.
If issue persists, provide a screenshot of the slide master view, with the steps you did on how you encounter the issue.
Regards
Mike